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2. Music and sleep - Wikipedia

   en.wikipedia.org/wiki/Music_and_sleep

   Gentle and soothing music can lead to increased delta wave activities which indicate deep sleep. [19] Several experiments have tested listening to preferred music significantly decreases cortisol levels and reduces the amount of stress experienced.

3. Slow-wave sleep - Wikipedia

   en.wikipedia.org/wiki/Slow-wave_sleep

   Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity is characterised by slow delta waves. [ 2 ] Slow-wave sleep usually lasts between 70 and 90 minutes, taking place during the first hours of the night. [ 3 ]

4. Sleep - Wikipedia

   en.wikipedia.org/wiki/Sleep

   Gamma waves are seen when a person is highly focused on a task or using all their concentration. Theta waves occur during the period of a person being awake, and they continue to transition into Stage 1 of sleep and in stage 2. Delta waves are seen in stages 3 and 4 of sleep when a person is in their deepest of sleep. [17]

5. Neural oscillation - Wikipedia

   en.wikipedia.org/wiki/Neural_oscillation

   Sleep stages are characterized by spectral content of EEG: for instance, stage N1 refers to the transition of the brain from alpha waves (common in the awake state) to theta waves, whereas stage N3 (deep or slow-wave sleep) is characterized by the presence of delta waves. [107] The normal order of sleep stages is N1 → N2 → N3 → N2 → REM.

6. Non-rapid eye movement sleep - Wikipedia

   en.wikipedia.org/wiki/Non-rapid_eye_movement_sleep

   Stage 3 – previously divided into stages 3 and 4, is deep sleep, slow-wave sleep (SWS). Stage 3 was formerly the transition between stage 2 and stage 4 where delta waves, associated with "deep" sleep, began to occur, while delta waves dominated in stage 4.

7. Brainwave entrainment - Wikipedia

   en.wikipedia.org/wiki/Brainwave_entrainment

   Brainwave entrainment is a colloquialism for 'neural entrainment', [25] which is a term used to denote the way in which the aggregate frequency of oscillations produced by the synchronous electrical activity in ensembles of cortical neurons can adjust to synchronize with the periodic vibration of external stimuli, such as a sustained acoustic ...

8. New-age music - Wikipedia

   en.wikipedia.org/wiki/New-age_music

   New-age is a genre of music intended to create artistic inspiration, relaxation, and optimism.It is used by listeners for yoga, massage, meditation, [1] and reading as a method of stress management [2] to bring about a state of ecstasy rather than trance, [3] [4] or to create a peaceful atmosphere in homes or other environments.

9. Rapid eye movement sleep - Wikipedia

   en.wikipedia.org/wiki/Rapid_eye_movement_sleep

   [10]: §9.1–2 263–282 (PGO waves have long been measured directly in cats but not in humans because of constraints on experimentation; however, comparable effects have been observed in humans during "phasic" events which occur during REM sleep, and the existence of similar PGO waves is thus inferred.) [15] These waves occur in clusters ...